Scientific Calculator
A free online scientific calculator with trigonometric, log, and power functions.
๐งฎA full scientific calculator in the browser
Trigonometry with a DEG/RAD toggle, logarithms, powers, roots, and constants โ type whole expressions like 2^10 + sqrt(144) * sin(30) and evaluate with Enter. No app to install, nothing uploaded: expressions evaluate on your device with proper operator precedence and bracket support.
๐The functions and how they behave
Trig works in degrees by default โ the school convention, so sin(30) = 0.5 exactly as your textbook expects โ with a one-tap RAD toggle for calculus work. log means base-10 and ln means natural log (base e); the two differ by the constant factor ln(10) โ 2.3026.
๐กCalculator habits for exams
- Estimate before you calculate โ if sin(30) shows anything but 0.5, you're in the wrong angle mode somewhere.
- Bracket aggressively: (a+b)/(c+d) needs both brackets or the division grabs only one term.
- Switch to RAD before any calculus-style problem โ derivatives and integrals assume radians.
- For step-by-step algebra rather than arithmetic, use our Equation Solver; for stats panels, the Statistics Calculator.
๐ก Frequently Asked Questions
Does this calculator use degrees or radians?+
Degrees by default โ the school convention, so sin(30) = 0.5 โ with a DEG/RAD toggle at the top for calculus work. Mode mismatch is the classic source of 'wrong' trig answers on any calculator.
What's the difference between log and ln?+
log is base-10 (log 100 = 2); ln is base-e, the natural logarithm (ln e = 1). They're proportional: ln(x) = log(x) ร 2.3026. Chemistry pH uses log; calculus and growth problems use ln.
Why did 2 + 3 ร 4 give 14 and not 20?+
Operator precedence: multiplication and division bind before addition and subtraction, exactly as in maths class. Use brackets โ (2+3)ร4 โ when you need a different order.
Can I type with my keyboard?+
Yes โ digits, operators, and brackets all work from the keyboard, with Enter to evaluate. Much faster than clicking buttons for long expressions.
Is this calculator allowed in exams?+
This is a study companion for homework and practice โ exam rules specify approved physical models. Practise the operations here, then replicate on your approved calculator.